R: Peek at variables in the selection context

peek_vars {tidyselect} | R Documentation

## Peek at variables in the selection context

### Description

- `peek_vars()` returns the vector of names of the variables currently available for selection.

- `peek_data()` returns the whole input vector (only available with `eval_select()`).

Read the Get started for examples of how to create selection helpers with `peek_vars()`.

The variable names in a selection context are registered automatically by `eval_select()` and `eval_rename()` for the duration of the evaluation. `peek_vars()` is the glue that connects selection helpers to the current selection context.

### Usage

    peek_vars(..., fn = NULL)

    peek_data(..., fn = NULL)

### Arguments

`...` | These dots are for future extensions and must be empty.
`fn` | The name of the function to use in error messages when the helper is used in the wrong context. If not supplied, a generic error message is used instead.

[Package tidyselect version 1.0.0 Index]